fin

• Sustantivo que designa un apéndice delgado y plano en el cuerpo de un pez u otro animal acuático, usado para nadar, dirigirse y mantener el equilibrio. También se aplica por analogía a partes o dispositivos similares, como las aletas de una embarcación o de una máquina.

A noun referring to a thin, flat appendage on the body of a fish or other aquatic animal, used for propulsion, steering, and balance.

1. Fish appendageA2formal

   A thin, flat part on the body of a fish, used for swimming and steering.

   Aleta de pez

   • The shark's dorsal fin cut through the water.
   • Fish use their fins to change direction quickly.
   • The tropical fish had brightly colored fins.

2. Aircraft or vehicle partB2formal

   A fixed or adjustable vertical or horizontal surface on an aircraft, car, or boat for stability.

   Aleta estabilizadora

   • The airplane's tail fin helps maintain stability during flight.
   • The car's rear fin was a popular design in the 1950s.
   • The boat's fin keel prevents it from capsizing.

   Sinónimosstabilizertail fin

• Verbo que significa nadar o moverse en el agua usando aletas, o equipar con aletas.

A verb meaning to swim or move through water using fins, or to equip with fins.

1. To swim using finsB2informal

   To swim or move through water using fins, typically in diving or snorkeling.

   Nadar con aletas

   • The diver finned gracefully through the coral reef.
   • She finned slowly to avoid startling the fish.
   • He finned his way to the surface for air.

   Sinónimosflipper

2. To equip with finsC1formal

   To attach or provide fins to something, such as a vehicle or equipment.

   equipar con aletas

   • The engineers finned the rocket for better stability.
   • They finned the surfboard to improve its performance.
   • The car was finned for aerodynamic efficiency.